Changeset 579 for trunk/VUT/GtpVisibilityPreprocessor/src/ViewCellsManager.cpp

Timestamp:

01/27/06 16:27:22 (18 years ago)

Author:

mattausch

Message:

started to include variance into the measures

File:

• trunk/VUT/GtpVisibilityPreprocessor/src/ViewCellsManager.cpp (modified) (1 diff)

trunk/VUT/GtpVisibilityPreprocessor/src/ViewCellsManager.cpp

@@ -356 +356 @@
 
 
+void ViewCellsManager::EvaluateRenderStatistics(float &totalRenderCost, 
+                                                                                                float &expectedRenderCost, 
+                                                                                                float &variance)
+{
+        ViewCellContainer::const_iterator it, it_end = mViewCells.end();
+
+        //-- compute expected value
+
+        totalRenderCost = 0;
+
+        for (it = mViewCells.begin(); it != it_end; ++ it)
+        {
+                ViewCell *vc = *it;
+
+                totalRenderCost += vc->GetPvs().GetSize() * vc->GetVolume();
+        }
+
+        expectedRenderCost = totalRenderCost / (float)mViewCells.size();
+
+
+        //-- compute variance
+        
+        variance = 0;
+
+        for (it = mViewCells.begin(); it != it_end; ++ it)
+        {
+                ViewCell *vc = *it;
+
+                float renderCost = vc->GetPvs().GetSize() * vc->GetVolume();
+
+                const float var = (expectedRenderCost - renderCost) * (expectedRenderCost - renderCost);
+
+                variance += var;
+        }
+        
+        variance /= (float)mViewCells.size();
+}
+
+
+
 void ViewCellsManager::AddViewCell(ViewCell *viewCell)
 {